213220856 has 24 divisors (see below), whose sum is σ = 417935280. Its totient is φ = 101973168.

The previous prime is 213220853. The next prime is 213220927. The reversal of 213220856 is 658022312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213220853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20960 + ... + 29423.

It is an arithmetic number, because the mean of its divisors is an integer number (17413970).

Almost surely, 2^213220856 is an apocalyptic number.

It is an amenable number.

213220856 is a deficient number, since it is larger than the sum of its proper divisors (204714424).

213220856 is a wasteful number, since it uses less digits than its factorization.

213220856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50435 (or 50408 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 213220856 is about 14602.0839608598. The cubic root of 213220856 is about 597.4156026519.

The spelling of 213220856 in words is "two hundred thirteen million, two hundred twenty thousand, eight hundred fifty-six".